Please note: For the correct size, you need to measure the outer diameter of the leg. You can use our easy measuring guide for this. Product Information The Round Insert Cap with Felt is an unobtrusive but effective chair cap specially designed to protect floors against scratches and damage. The product is made of high-quality materials and is suitable for various types of furniture legs, such as chairs, tables, stools and benches. The leg must stand straight on the floor. If the leg is at an angle on the floor, the Round Insert Cap with Movable Ball and Felt or the Scratchnomore Footfixx Hollow is a better solution. These round insert caps with felt are available for chair legs with an outer diameter of 12 up to 38 mm. The thick layer of felt is of very good quality and noise-reducing. These caps work best on almost all smooth or wooden floors such as: PVC, Laminate, smooth tiles and parquet. Installation is easiest by tapping the chair cap in with a plastic or rubber hammer. Size Chart Round Insert Cap with Felt Outer Diameter (mm) Inner Diameter (mm) 12 4 – 10.5 14 6 – 13 15 8 – 13.2 16 10 – 14 18 13.3 – 16.8 19 14.2 – 17.8 20 15.1 – 19 22 15.8 – 20.6 25 18.8 – 24 28 21.5 – 27 30 23.4 – 29 32 26.3 – 30.5 35 27 – 33.5 Material: PE (Polyethylene) and feltColor: black cap with felt